<template>
    <el-container>
      <!--头部区域-->
      <el-header>
        <div>
          <img src='../assets/heima.png'>
          <span>电商后台管理系统</span>
        </div>
         <el-button type="info" @click="exit">退出登录</el-button>
      </el-header>
      <!--页面主体区域-->
      <el-container>
        <!--侧边栏-->
        <el-aside :width="isCollapse ? '64px' : '200px' ">
          <div class="toggleButton" @click="toggle">|||</div>
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409EFF"
            unique-opened
            :collapse='isCollapse'
            :collapse-transition='false'
            router
            :default-active='activePath'>
      <!--一级菜单-->
      <el-submenu :index="item.id+''" v-for='item in menuList' :key='item.id'>
        <!--一级菜单模板-->
        <template slot="title">
          <!--图标-->
          <i :class="iconObj[item.id]"></i>
          <!--文本内容-->
          <span>{{item.authName}}</span>
        </template>
        <!--二级菜单-->
          <el-menu-item :index="'/' + SubItem.path" v-for='SubItem in item.children' :key='SubItem.id' @click="getActivePath('/' + SubItem.path)">
            <template slot="title">
              <!--图标-->
              <i class="el-icon-menu"></i>
              <!--文本内容-->
              <span>{{SubItem.authName}}</span>
            </template>
          </el-menu-item>
        </el-submenu>
    </el-menu>
        </el-aside>
        <!--右侧主体内容-->
        <el-main>
        <router-view></router-view>
        </el-main>
       </el-container>
    </el-container>
</template>
<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
      }
    },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    exit () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取左侧菜单数据
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return res.meta.msg
      this.menuList = res.data
    },
    // 打开或折叠菜单栏
    toggle () {
      this.isCollapse = !this.isCollapse
    },
    // 保存被激活的index路径
    getActivePath (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style lang="less" scoped>
.el-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display:flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 0;
  color: #eee;
  > div{
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
  }
}
.el-aside{
  background-color: #333744;
  .el-menu{
    border-right: 0;
  }
  .el-submenu i{
    margin-right: 10px;
  }
}
.toggleButton{
  background-color:#4A5064;
  color:#fff;
  text-align: center;
  font-size: 10px;
  line-height: 24px;
  letter-spacing: 0.2em;
}
.el-main{
  background-color: #eaedf1;
}

</style>
